公开(公告)号：US10447152B2

公开(公告)日：2019-10-15

申请号：US15465504

申请日：2017-03-21

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  San Hwa Chee

IPC: H02M1/08 ,  H02M3/07 ,  H02M1/36

Abstract: A method and system of driving a switched capacitor converter having a plurality of switches. A first driver coupled to a first switch is powered by providing a first reference voltage level VCC to a first supply and a GND reference to a second supply node of the first driver. A second driver coupled to a second switch is powered by providing a unidirectional path between the first supply node of a first driver and the first supply node of the second driver and by keeping OFF the second switch while turning ON the first switch. A third driver coupled to a third switch is powered by providing a unidirectional path between the first supply node of a second driver and the first supply node of the third driver and by keeping OFF the first and third switch while turning ON the second switch.

公开(公告)号：US10084381B2

公开(公告)日：2018-09-25

申请号：US15654568

申请日：2017-07-19

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  Zhouyuan Shi ,  Yi Ding Gu

IPC: G06F1/00 ,  H02M3/158 ,  H02M1/00

CPC classification number: H02M3/1582 ,  H02M2001/0009

Abstract: An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

公开(公告)号：US20170324331A1

公开(公告)日：2017-11-09

申请号：US15654568

申请日：2017-07-19

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  Zhouyuan Shi ,  Yi Ding Gu

IPC: H02M3/158 ,  H02M1/00

CPC classification number: H02M3/1582 ,  H02M2001/0009

Abstract: An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

公开(公告)号：US09748843B2

公开(公告)日：2017-08-29

申请号：US14677794

申请日：2015-04-02

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  Zhouyuan Shi ,  Yi Ding Gu

IPC: G05F1/24 ,  H02M3/158 ,  H02M1/00

CPC classification number: H02M3/1582 ,  H02M2001/0009

Abstract: An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

公开(公告)号：US10468978B2

公开(公告)日：2019-11-05

申请号：US15465487

申请日：2017-03-21

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  San Hwa Chee

IPC: H02M3/07 ,  H02M1/36 ,  H02M1/08

Abstract: Methods and systems of pre-balancing a switched capacitor converter are provided. A first comparator includes a positive input configured to receive a voltage across an output capacitor and a negative input configured to receive a first hysteresis voltage. A second comparator includes a positive input configured to receive a voltage across an input capacitor of the switched capacitor converter and a negative input configured to receive a second hysteresis voltage. A first current source is coupled between the output capacitor and GND and is configured to discharge the output capacitor upon determining that the voltage across the output capacitor is above a tolerance provided by the first hysteresis voltage. A second current source is coupled between the input capacitor and GND and is configured to discharge the input capacitor upon determining that the voltage across the input capacitor is above a tolerance provided by the second hysteresis voltage.

公开(公告)号：US20180019666A1

公开(公告)日：2018-01-18

申请号：US15465504

申请日：2017-03-21

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  San Hwa Chee

IPC: H02M3/07 ,  H02M1/08

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M1/36 ,  H02M3/073 ,  H02M2003/072

Abstract: A method and system of driving a switched capacitor converter having a plurality of switches. A first driver coupled to a first switch is powered by providing a first reference voltage level VCC to a first supply and a GND reference to a second supply node of the first driver. A second driver coupled to a second switch is powered by providing a unidirectional path between the first supply node of a first driver and the first supply node of the second driver and by keeping OFF the second switch while turning ON the first switch. A third driver coupled to a third switch is powered by providing a unidirectional path between the first supply node of a second driver and the first supply node of the third driver and by keeping OFF the first and third switch while turning ON the second switch.

公开(公告)号：US20180019665A1

公开(公告)日：2018-01-18

申请号：US15465339

申请日：2017-03-21

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  San Hwa Chee

IPC: H02M3/07

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M1/36 ,  H02M3/073 ,  H02M2003/072

Abstract: Methods and systems of controlling a switched capacitor converter are provided. Upon determining that a voltage across a flying capacitor is above a first threshold, a first current is drawn from a first terminal of the flying capacitor by a first current source, and a second current is provided to a second terminal of the flying capacitor by a second current source. Upon determining that the voltage across the flying capacitor is below a second threshold, the first current is provided to the first terminal of the flying capacitor by the first current source, and the second current is drawn from the second terminal of the flying capacitor by the second current source. Upon determining that the voltage across the flying capacitor is above the second threshold and below the first threshold from the reference voltage, the first and second current sources are turned OFF.

公开(公告)号：US09998000B2

公开(公告)日：2018-06-12

申请号：US15465339

申请日：2017-03-21

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  San Hwa Chee

IPC: H02M3/07 ,  G05F3/08

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M1/36 ,  H02M3/073 ,  H02M2003/072

Abstract: Methods and systems of controlling a switched capacitor converter are provided. Upon determining that a voltage across a flying capacitor is above a first threshold, a first current is drawn from a first terminal of the flying capacitor by a first current source, and a second current is provided to a second terminal of the flying capacitor by a second current source. Upon determining that the voltage across the flying capacitor is below a second threshold, the first current is provided to the first terminal of the flying capacitor by the first current source, and the second current is drawn from the second terminal of the flying capacitor by the second current source. Upon determining that the voltage across the flying capacitor is above the second threshold and below the first threshold from the reference voltage, the first and second current sources are turned OFF.

公开(公告)号：US20160164412A1

公开(公告)日：2016-06-09

申请号：US14755336

申请日：2015-06-30

Applicant: Linear Technology Corporation

Inventor： Jian Li ,  Yingyi Yan ,  Xu Zhang ,  Zhouyuan Shi

IPC: H02M3/158

CPC classification number: H02M3/1588 ,  G01R19/0092 ,  G01R31/40 ,  H02M3/156 ,  H02M2001/0009

Abstract: In a current mode switching power supply, current through the inductor needs to be sensed to control the peak current. The inductor current includes a DC component and an AC component containing switching noise. To reduce the switching noise, the actual inductor current is sensed to generate a signal, and a first AC component is attenuated by a first RC circuit while not attenuating a first DC component. A second AC component is derived by applying the rectangular wave switch voltage, which is at the duty cycle of the regulator, to a second RC filter, which blocks a second DC component. The second AC component is much larger than the first AC component and does not contain switching noise. The large second AC component, the smaller “noisy” first AC component, and the first DC component are applied to the first RC circuit to create a low-noise inductor current signal.

Abstract translation: 在电流模式切换电源中，需要检测通过电感的电流来控制峰值电流。 电感电流包括DC分量和包含开关噪声的AC分量。 为了减小开关噪声，感测实际的电感电流以产生信号，并且第一AC分量由第一RC电路衰减而不衰减第一DC分量。 通过将处于调节器的占空比的矩形波开关电压施加到阻塞第二DC分量的第二RC滤波器来导出第二AC分量。 第二个交流分量比第一个交流分量大得多，不包含开关噪声。 大的第二AC分量，较小的“噪声”第一AC分量和第一DC分量被施加到第一RC电路以产生低噪声电感器电流信号。

公开(公告)号：US20160087531A1

公开(公告)日：2016-03-24

申请号：US14677794

申请日：2015-04-02

Applicant: Linear Technology Corporation

Inventor： Xu Zhang ,  Jian Li ,  Zhouyuan Shi ,  Yi Ding Gu

IPC: H02M3/158

CPC classification number: H02M3/1582 ,  H02M2001/0009

Abstract: An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.

Abstract translation: 用于测量电感器中的电流的电感器电流感测电路包括（a）耦合在电感器的第一端子和参考电压源之间的第一RC网络; 和（b）耦合在电感器的第二端子和参考电压源之间的第二RC网络。 第一RC网络和第二RC网络各自具有基本上等于电感器和电感器的直流电阻之间的比率的时间常数。 正在测量电流的电感器可以是接收输入电压并提供输出电压的四开关降压升压转换器的初级电感器。